Hello, syzbot found the following issue on: HEAD commit: 70cd0576aa39 usb: hcd: Bump local buffer size in rh_string() git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing console output: https://syzkaller.appspot.com/x/log.txt?x=12323618580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8e4b3bd94cc7cf2d dashboard link: https://syzkaller.appspot.com/bug?extid=5436ca1cdd0d80367019 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/612846dc004d/disk-70cd0576.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2adbdc698bbb/vmlinux-70cd0576.xz kernel image: https://storage.googleapis.com/syzbot-assets/111a4615d3e0/bzImage-70cd0576.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5436ca1cdd0d80367019@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ ODEBUG: free active (active state 0) object: ffff888130e20030 object type: work_struct hint: cfg80211_rfkill_block_work+0x0/0x30 net/wireless/core.c:316 WARNING: CPU: 1 PID: 22030 at lib/debugobjects.c:612 debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612 Modules linked in: CPU: 1 UID: 0 PID: 22030 Comm: kworker/1:5 Not tainted 6.13.0-rc7-syzkaller-g70cd0576aa39 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: usb_hub_wq hub_event RIP: 0010:debug_print_object+0x1a2/0x2b0 lib/debugobjects.c:612 Code: fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 54 48 8b 14 dd 40 45 47 87 41 56 4c 89 e6 48 c7 c7 c0 39 47 87 e8 af b1 c0 fe 90 <0f> 0b 90 90 58 83 05 06 73 f7 07 01 48 83 c4 18 5b 5d 41 5c 41 5d RSP: 0018:ffffc9000243f468 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffc90010538000 RDX: 0000000000100000 RSI: ffffffff811f6866 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 00000000012c1108 R12: ffffffff87474060 R13: ffffffff87272fe0 R14: ffffffff86911680 R15: ffffc9000243f578 FS: 0000000000000000(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f11ff14b440 CR3: 0000000008ca0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __debug_check_no_obj_freed lib/debugobjects.c:1099 [inline] debug_check_no_obj_freed+0x4b7/0x600 lib/debugobjects.c:1129 free_pages_prepare mm/page_alloc.c:1134 [inline] free_unref_page+0x228/0xe40 mm/page_alloc.c:2659 __folio_put+0x1e8/0x2d0 mm/swap.c:112 device_release+0xa1/0x240 drivers/base/core.c:2567 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1e4/0x5a0 lib/kobject.c:737 put_device+0x1f/0x30 drivers/base/core.c:3773 rtl8187_disconnect+0x117/0x150 drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c:1678 usb_unbind_interface+0x1e2/0x960 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:569 [inline] device_remove+0x122/0x170 drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1273 [inline] device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1296 bus_remove_device+0x22f/0x420 drivers/base/bus.c:576 device_del+0x396/0x9f0 drivers/base/core.c:3854 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1418 usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2305 hub_port_connect drivers/usb/core/hub.c:5363 [inline] hub_port_connect_change drivers/usb/core/hub.c:5663 [inline] port_event drivers/usb/core/hub.c:5823 [inline] hub_event+0x1bed/0x4f40 drivers/usb/core/hub.c:5905 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
